Interlocking system for railroads



Nov. 23, 1965 W. L. LIVINGSTON INTERLOCKING SYSTEM FOR RAILROADS ENTRANCE-EXIT SELECTION CIRCUITRY Filed Nov. 3. 1960 21 h h et l I TRACK T T r I I- I I T II I I I I I I I Io- 'I-O I I' IOJ| M 1 I 36 Y I L I :L I I i L. -J I f I E i I I SWITCH OONTROI. sIGNAI CONTROL TRAIN I CIRCUITRY OIROUITRY IDENTIFICATION I SYSTEM I I I I SECTIONAL ROUTE E1 t: DETERMINING CIRCUITRY x I hgEMOFY MASTER ROUTE DETERMINING CIRCUITRY MEMORY MEMORY SELECTION RESPONSIVE READ-OUT READ-OUT CIRCUITRY CIRCUITRY I I I I +'/2I "2 2 I ROUTE STORING MANUAL OPERATION O O O o O O O CONTROL PANEL OOOO[*:3= ZZZQIZ IN V EN TOR.

Y V. L. LIVINGSTON HIS ATTORNEY FIG. 2.

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INTERLOCKING SYSTEM FOR RAILROADS Filed Nov. 5. 1960 21 Sheets-Sheet 8 FIG. 3F.

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INTERLOCKING SYSTEM FOR RAILROADS Filed Nov. 5, 1960 21 Sheets-Sheet l1 I I I I l I I I I I I I I I l I I I I I I I I I I I I I I I I I IN V EN TOR.

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18. A SWITCH AND SIGNAL CONTROL SYSTEM FOR A TRACK LAYOUT HAVING A PLURALITY OF DIFFERENT AND CONFLICTING ROUTES AND BEING OF THE TYPE HAVING ROUTE ESTABLISHING MEANS EFFECTIVE WHEN ACTIVATED TO OPERATIVELY CONTROL CERTAIN OF THE SWITCHES AND SIGNALS FOR A DESIGNATED ROUTE COMPRISING, (A) TRAIN IDENTITY MEANS CONTROLLED BY THE APPROACH OF A TRAIN OF THE TRACK LAYOUT FOR REGISTERING THE IDENTITY OF THE APPROACHING TRAIN, (B) ROUTE STORAGE MEANS OPERATIVE TO RANDOMLY STORE CONTEMPORANEOUSLY THE IDENTITIES OF A PLURALITY OF PREDETERMINED CONFLICTING ROUTES THROUGH THE TRACK LAYOUT, (C) READOUT CIRCUIT MEANS RESPONSIVE TO A TRAIN IDENTITY REGISTERED BY SAID TRAIN IDENTITY MEANS TO CAUSE THE STORAGE MEANS TO SELECTIVELY ACTIVATE THE ROUTE ESTABLISHING MEANS IN ACCORDANCE WITH A PREDETERMINED STORED ROUTE IDENTITY AND TO CANCEL SAID PREDETERMINED STORED ROUTE IDENTITY IN THE STORAGE MEANS, AND (D) READBACK CIRCUIT MEANS RESPONSIVE TO SAID READOUT CIRCUIT MEANS FOR RESTORING SAID CANCELLED ROUTE IDENTITY IN SAID STORAGE MEANS. 